Septic tank



FIG. 1 is a perspective view of the septic tank (with lids securedthereon) showing our new design.

FIG. 2 is an exploded side elevation view of the septic tank and twolids,

FIG. 3 is a top elevation view of the septic tank with lids securedthereon;

FIGS. 4 and 5 are exploded side elevation views thereof.

FIG. 6 is a bottom plan view thereof; and,

FIG. 7 is a top elevation view of the septic tank with the lids removed.

The ornamental design for a septic tank, as shown and described.